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I just got the new released AMT/ERTL Payhauler 350. What a nice kit. I want to build a truck and trailer to haul it and I want it to be realistic. 

The truck brand does not matter, but what should I look for/build to make it able to haul this huge load? How many axles? Would I need standard 2 driven and a drop axle? 3 Driven axles? I assume I would want a larger flotation front tire, but what about the rears? I want it to be era correct, and heavy duty, thinking maybe a Mack DM600, Mack R685ST, White or a REO? It would need a big engine too, any suggestions?

Trailer, I know it will need to be big, but how big? How many axles would I need? Would it need a gooseneck dolly? I really have no idea how much trailer I need, and what a good starting point is. 

Please share your wisdom on this with me. I know there are truck drivers on here as well as just truck nuts. 

Edited by Oldmopars

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Here is a picture I found. Looks like the trailer would be a lot of scratch building. I count 5 axles on the trailer alone. However I did find other pictures of it on a 3 axle trailer. Not sure what is right. 

Peterbilt_Payhauler_01a.jpg

9eaa0e2c-0723-4a06-8_1250x1250-uncropped.png

Edited by Oldmopars

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Not the final answer, but here's more information.

Wikipedia says the Payhauler curb weight is 36 tons (86 tons loaded).  The normal weight capacity for an axle with 4 tires is 20,000 pounds - but it was a little less on most of the trailers that were around at that time. - let's say 18,000 pounds per axle for this heavy duty application.  But the axles also have to carry the weight of the trailer.

I think what we are not seeing in these pictures is the dolly at the front of the trailer that distributes the load between the dolly and the rear of the tractor.  Here's another picture that shows the dolly.

Three axles at the rear of the trailer, two axles on the dolly, plus two drive axles on the tractor.

Since this truck will have some off highway miles, I'd probably go with a tractor kit that has the Hendrickson walking beam rear suspension rather than a four spring or air ride.

hope this helps

 

 

Peterbilt_Payhauler_01.jpg

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Hey OldMopar

 Check out my posts on my Pete 359 4 axle heavy haul tractor, my 3 axle Loadking drop nose lowboy trailer, and my 4 axle drop nose lowboy trailer with flip up rear axle. The 3 axle is a 70 ton and the 4 axle is 120 ton capacity.

  I plan on 3D printing some of the 3 axle and 4 axle trailer parts. The main bed/well of the trailers will be made out of Plastsruct styrene plastic "I" beams, 5/8", 1/2", 3/8" and various other plastic shapes.

  Right now I only have them designed on Unigraphics NX11, I haven't started them in plastic yet, but there are lots of pictures of them in the posts.

  The Pete 359 is being built out of an old Revell  "Can Do" wrecker kit. It has a Cummins ntc-475 twin turbo, which when worked on can put out over 800 hp!  I'm detailing it with all the fuel, oil, air and water lines. Check it out you my get some ideas.

Ron G 

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Here is my triple drive Freightliner and extended deck lowboy trailer. Get at least two of the trailers to start. Have fun scratch building. :)

 

 

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11 hours ago, Muncie said:

 

Not the final answer, but here's more information.

Wikipedia says the Payhauler curb weight is 36 tons (86 tons loaded).  The normal weight capacity for an axle with 4 tires is 20,000 pounds - but it was a little less on most of the trailers that were around at that time. - let's say 18,000 pounds per axle for this heavy duty application.  But the axles also have to carry the weight of the trailer.

I think what we are not seeing in these pictures is the dolly at the front of the trailer that distributes the load between the dolly and the rear of the tractor.  Here's another picture that shows the dolly.

Three axles at the rear of the trailer, two axles on the dolly, plus two drive axles on the tractor.

Since this truck will have some off highway miles, I'd probably go with a tractor kit that has the Hendrickson walking beam rear suspension rather than a four spring or air ride.

hope this helps

 

 

Peterbilt_Payhauler_01.jpg

What kits would have the Hendrickson Walking Beam? And would it work with triple drive, or just add a standard drop axle?

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Sorry, I can't recall right off which kits have the Hendrickson suspension... Odd place for it but maybe the Kenworth T600...  there are probably others..  The walking beam is a two axle suspension.  https://hendrickson-intl.com/Truck/Vocational/RT-RTE      A pusher non-drive axle ahead of the tandem could be added.  For tri-drive, see Bill72sj's beautiful Freightliner - looks like a four spring with an additional spring suspension for the third axle.

RT-RTE?maxsidesize=406

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The paystar 5000 has the walking beam suspension i thought..have to check box after work

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Here’s another one. Looks like a more modern truck and trailer than what you’re going for, but it reinforces your thoughts.0C863CB8-9407-4B0B-ACDD-6AAF74263360.jpeg.a4c93811a30f9156169c64c32b40204e.jpeg

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On 9/17/2020 at 8:05 AM, Muncie said:

Sorry, I can't recall right off which kits have the Hendrickson suspension... Odd place for it but maybe the Kenworth T600...  there are probably others..  The walking beam is a two axle suspension.  https://hendrickson-intl.com/Truck/Vocational/RT-RTE      A pusher non-drive axle ahead of the tandem could be added.  For tri-drive, see Bill72sj's beautiful Freightliner - looks like a four spring with an additional spring suspension for the third axle.

RT-RTE?maxsidesize=406

Thanks again, I thought I had a truck with this on it and it turns out I have the perfect kit. I have an old issue ERTL International 4300 Eagle that I have been slowly working on, but had stalled as I did not really have a vision for it. However it is a perfect compliment to the IH Pay Hauler and it has the Hendrickson suspension that was suggested. However it looks like I may need to add a drop axle. 

IMG_4731.jpg

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Well, I now have a direction for this. I did a mock up of what the final product will look like. I used a AMT Lowboy trailer from another build to see if it will work. I think it is going to take a big of creativity to make it fit, but some extensions may just do the trick. 

I built up the frame, engine and dump box this last week while in a Hotel near a job I was working. Next week I have to fly to to the job, so I can't bring it with me. Anyway, here is where it is currently at with the truck, Payhauler and the type of trailer I will use. I will get a new trailer as this one is in use. 

 

IMG_4733.jpgIMG_4732.jpg.ad08c57c2a11e3d53e7be45e03f24fef.jpg

IMG_4734.jpg

IMG_4735.jpg

Edited by Oldmopars

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What you have there has potential via frame extension. If you get two Lowboy trailer kits you could get very creative with the axle count, dolly possibilities.

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I am thinking I need to order 2 lowboy kits and make a drop deck trailer. I am thinking that the overall height may be too high. If I drop it down, make it longer and maybe even create a dolly it should work. I will extend the sides too. 

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So, I ordered 2 AMT 880 Lowboy kits. My plan is t cut them up, make the lowboy into a much lower trailer like see above, narrow the front to a Goose neck style and add a Jeep Dolly. I may add a drop axle to the rear also. This is going to be fun. I will have 20lbs of styrene and need a huge shelf for it. Below is the direction I am thinking. A bit shorter on the front dolly, but I like the drop down axle at the rear as opposed to a long extended version. 

 image.png.31d096554af08a1f9e6cb1e6c9a1298c.png82532385240b1ddde1c4da9a5e17dcff.jpg

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Scott you’re setting your lowboy up to be an awesome build. I’m going to be following with great interest. 

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